/**
 * Copyright (c) 2012-2017, www.tinygroup.org (luo_guo@icloud.com).
 * <p>
 *  Licensed under the GPL, Version 3.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * <p>
 *       http://www.gnu.org/licenses/gpl.html
 * <p>
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
/**
 * 
 */
package org.tinygroup.remoteconfig.placeholder;

import java.net.InetAddress;
import java.net.UnknownHostException;

import org.apache.commons.lang.StringUtils;
import org.tinygroup.remoteconfig.IRemoteConfigConstant;

/**
 * 占位符规则
 * 
 * @author yanwj06282
 *
 */
public class HostNameHander implements PlaceHolderHander{

	public String handle(String str){
		if (StringUtils.indexOf(str, IRemoteConfigConstant.HOST_NAME) > -1) {
			return StringUtils.replace(str, IRemoteConfigConstant.HOST_NAME, getHostName());
		}
		return str;
	}
	
	private String getHostName(){
        InetAddress addr;
		try {
			addr = InetAddress.getLocalHost();
			return addr.getHostName();
		} catch (UnknownHostException e) {
			throw new RuntimeException("获取主机hostname失败！", e);
		}
	}
	
}
